WO2007147609A2 - Dispositif de contrôle d'un appareil de mesure - Google Patents

Dispositif de contrôle d'un appareil de mesure Download PDF

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Publication number
WO2007147609A2
WO2007147609A2 PCT/EP2007/005496 EP2007005496W WO2007147609A2 WO 2007147609 A2 WO2007147609 A2 WO 2007147609A2 EP 2007005496 W EP2007005496 W EP 2007005496W WO 2007147609 A2 WO2007147609 A2 WO 2007147609A2
Authority
WO
WIPO (PCT)
Prior art keywords
monitoring device
detection means
monitor
pointer
light source
Prior art date
Application number
PCT/EP2007/005496
Other languages
German (de)
English (en)
Other versions
WO2007147609A3 (fr
Inventor
Remzi Zecirovic
Original Assignee
Bundesanstalt für Materialforschung und -Prüfung (BAM)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bundesanstalt für Materialforschung und -Prüfung (BAM) filed Critical Bundesanstalt für Materialforschung und -Prüfung (BAM)
Priority to US12/305,930 priority Critical patent/US20110179990A1/en
Priority to DE202007018337U priority patent/DE202007018337U1/de
Priority to EP07785834A priority patent/EP2035784A2/fr
Publication of WO2007147609A2 publication Critical patent/WO2007147609A2/fr
Publication of WO2007147609A3 publication Critical patent/WO2007147609A3/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/08—Means for indicating or recording, e.g. for remote indication
    • G01L19/083—Means for indicating or recording, e.g. for remote indication electrical
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D13/00—Component parts of indicators for measuring arrangements not specially adapted for a specific variable
    • G01D13/22—Pointers, e.g. settable pointer
    • G01D13/26—Pointers, e.g. settable pointer adapted to perform a further operation, e.g. making electrical contact
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/08—Means for indicating or recording, e.g. for remote indication
    • G01L19/12—Alarms or signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D2213/00—Indexing scheme relating to constructional details of indicators
    • G01D2213/10—Drivers for gauges

Definitions

  • the present invention relates to a monitoring device for a measuring device, in particular a monitoring device for a measuring device with a pointer that moves in front of a sheet.
  • the invention relates to a monitoring device for a manometer.
  • measuring devices which either via a digital display, for. B. have an LED display or an analog display for the measured values.
  • an analog display has a pointer which is movable relative to a scale of measurement located on a dial. The pointer position is set according to the actual value of a measured variable, so that the actual value of the measured variable is optically readable on the measured value scale.
  • the pointer and the sheet have a different reflection behavior with respect to the visible light, so that the movement of the pointer against the background of the sheet is visible to the human eye.
  • measuring devices are used to monitor process parameters in order to ensure safe process control.
  • pressure gauge pressure gauges can be used to help protect pressurized equipment against over-loading and control the inlet pressure of pressure-converting machinery.
  • the pressure-maintaining system must be protected against uncontrolled pressure rise by an upstream compressor (maximum 1600 bar) and at the same time the pressure maintenance in the system must be ensured.
  • Contact pressure gauges are known for this task. Contact pressure gauges are pressure gauges used in addition to a continuous pressure gauge mainly for monitoring and signaling of minimum and maximum pressures. In this case, a switching operation is carried out as soon as the measured value pointer assumes a specific position to an adjustable setpoint pointer.
  • a light source and a light sensor face each other in such a way that the light emitted by the light source strikes the sensor directly. If the pointer of the measuring instrument now moves between the light source and the sensor, this leads to an interruption of the light barrier and a corresponding signal pulse is triggered.
  • the use of such a monitor with a forked light barrier always requires a reconstruction of the manometer, since the light barrier must be arranged so that the pointer can move between the light source and the sensor. This is particularly expensive because the pointer and dial are usually covered by a glass. For the above reasons, the installation of such a monitoring device is time-consuming and difficult to undo.
  • a monitor for a meter having a pointer and a blade.
  • the pointer and the sheet from each other different reflection behavior for light For example, the leaf is colored white, whereas the pointer is colored black.
  • the monitor further comprises a first detection means having a light source and a sensor.
  • the monitoring device comprises at least one fastening means which serves for fastening the detection means to the measuring device.
  • the detection means can be arranged so that the first sensor can capture reflected light emitted by the measuring device from the first light source.
  • the monitor according to the embodiment of the present invention registers not a break in a photocell but a change in reflectivity of the emitted light, that is, a change in the characteristic of the reflected portion of the emitted light.
  • the light source and the sensor z. B. are arranged laterally next to each other according to a further exemplary embodiment.
  • the light source and sensor can be mounted on a glass cover of the monitor, for example, without the need to reconfigure the monitor.
  • Another advantage of the monitoring device according to the invention is that now not every meter must be provided with a respective monitor, but due to the ease attachability and removability of the monitor to the meter a single monitor can serve successively to monitor different meter.
  • the light source and the sensor can be fastened and positioned, for example, with adhesive strips on the housing of the display unit. Power supply and supply or discharge of the respective signals can be done via simple wires. In this case, the actual signal processing takes place in an external device.
  • the detection means comprises a lens for focusing the light emitted by the light source.
  • this lens may be formed as a common lens for the light source and the sensor. In this way, both the emitted and the reflected light are focused by the same lens.
  • the light source is designed as a photodiode, in particular as an IR photodiode.
  • the senor is designed as a phototransistor.
  • the light source and the sensor are integrated in a housing.
  • the monitor is configured to detect the position of a pointer tip of the pointer during operation.
  • the monitor is configured to detect in use the position of a pointer foot of the pointer.
  • the attachment means is adapted to be attachable to a housing of the meter.
  • the fastener may include a ring, the z. B. can be fixed by screws on the housing of the meter.
  • This ring may be formed according to a further embodiment of the present invention so that a plurality of detection means can be attached to it.
  • the fastening means may comprise a snap closure, which allows a quick and easy attachment of the monitoring device to the housing of the measuring device.
  • the attachment means may be at least partially formed of a transparent material such as Plexiglas.
  • the detection means is integrally formed with the attachment means.
  • the monitoring device further comprises a circuit.
  • This circuit can be designed to control the detection means or the signal processing of signals of the detection means and for the evaluation of signals of the detection means. In this way finds one Signal processing and evaluation are already taking place in the monitoring device.
  • the circuit is formed integrally with the fastening means. For example, it may be cast with two-component cast resin along with the detection means to allow explosion-proof operation. Furthermore, the sensitivity of the circuit can be made adjustable, so that the circuit can be adapted to different measuring devices.
  • the monitoring device may include another detection means. In this way either a redundancy in the measurement of the pointer position can be achieved or else maximum and minimum values of a measuring range can be determined.
  • the distance between the first and the second detection means is variable, so that a measuring range can be set variably.
  • the distance between the first and second detection means is fixed. In this way, an exact measuring range for a specific type of measuring instruments can be specified exactly.
  • meter is a pressure gauge.
  • the monitoring device can be connected to a pressure control device via an external connection.
  • FIG. 1 is a plan view of a measuring device with a schematic representation of a monitoring device according to an embodiment of the present invention
  • Fig. 2 is a side sectional view of a monitor according to another embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a monitoring device according to an embodiment of the present invention.
  • 4 shows a circuit for a monitoring device according to an exemplary embodiment of the present invention
  • Fig. 5 is a plan view of another embodiment of the present invention.
  • Fig. 6 is a plan view of still another embodiment of the present invention.
  • Fig. 7 is a perspective view of another embodiment of the present invention.
  • Fig. 8 is a view of the embodiment of Figure 7 in operation.
  • Fig. 9 is a plan view of still another embodiment of the present invention.
  • Fig. 10 is a plan view of still another embodiment of the present invention.
  • FIG. 11 shows a schematic representation of a pressure monitoring with the aid of a monitoring device according to an exemplary embodiment of the present invention
  • FIG. 12 is a block diagram of the pressure monitoring of FIG. 11.
  • FIG. 1 shows a plan view of a measuring device 100, which has a pointer 120 which is arranged above a dial 110. On the dial 110, a measured value scale 115 is attached.
  • the pointer 120 has a pointer tip 122, which is located in the range of the measured value scale 115. Furthermore, the pointer 120 has a pointer foot 124, which has a first lateral end 125 and a second lateral end 126.
  • the pointer 120 is rotatably mounted about an axis of rotation 128, so that the pointer tip 122 passes over the measured value scale 115 upon rotation of the pointer 120.
  • FIG. 1 shows by way of example the arrangement of a monitoring device 200 according to an embodiment of the present invention Invention.
  • the monitoring device 200 is arranged in the vicinity of the measurement scale 115 so that it can detect the pointer tip 122.
  • the monitor 200 is disposed in the area of the pointer soot 124 so that it can detect the first lateral edge 125 and / or the second lateral edge 126 of the pointer pad.
  • a measuring device to be monitored has a housing 105 of a display.
  • a surface of the housing 105 has a recess at the bottom of the dial 110 is attached.
  • the pointer 120 is rotatably mounted about a rotation axis 128.
  • the pointer 120 extends substantially parallel to the dial 110.
  • the pointer 120 and the dial 110 are protected by a glass cover 130 against external influences.
  • the monitoring device 200 has a detection means 210 and a fastening means 250.
  • the detection means 210 is arranged in a carrier 260 of the fastening means.
  • a circuit 240 for controlling the detection means 210 and for evaluating signals which are transmitted from the detection means 210 to the circuit 240, in the carrier 260 is integrated.
  • the fastening means 250 further has a snap closure 270, in which a pivot arm 274 is pivotally mounted about a pivot axis 278. With the aid of the fastening means 250, the detection means 210 can be arranged over the display so that it can detect the pointer foot 124 of the pointer 120.
  • FIG. 3 shows a block diagram on the basis of which the mode of operation of the monitoring device 200 will now be explained.
  • the monitoring device 200 has a detection means 210, which is connected to a drive and evaluation circuit 240.
  • the detection means has a light source 220 and a sensor 230.
  • the light source 220 and the sensor 230 are arranged side by side. In this case, the light source 220 and the sensor 230 are integrated in a housing 215, but separated from one another by a wall 217, so that light 226 emitted by the light source can not fall directly onto the sensor 230.
  • the light source 220 includes an IR photodiode 222, the light of which is focused by means of a lens 224. Typically, a focus of 5 - 50 mm is set here.
  • the thus focused light 226 falls on the surface of the dial 110 and is reflected therefrom.
  • the reflected light 228 is captured by a lens 234 of the sensor 230 and directed to a phototransistor 232.
  • the Phototransistor 232 generates an output signal according to the received reflected light 228.
  • the emitted light 226 should impinge on the dial 1 10 at an angle other than 90 °. This can be achieved either by the orientation of the photodiode 222 or by the orientation or the shape of the lens 224.
  • the surface 110 of the dial is usually configured white in color, so that substantially all of the emitted light 226 also reaches the sensor region 230 as reflected light 228. Now moves the pointer 120 to the point at which the light hits 226, the emitted light 226 is now reflected by the pointer 120 instead of the dial 110. As a result, the reflection behavior of the light changes, that is, the reflected light 228 has a different characteristic from that in the case where the light has been reflected by the dial 110.
  • the monitoring device 200 furthermore has a power supply 242, which can either be designed as a battery or can be made via an external power supply. Basically, a supply via solar cells is conceivable.
  • the power supply 242 supplies both the detection means 210 and the evaluation circuit 240.
  • Fig. 4 shows a more detailed representation of the evaluation circuit 240.
  • the detection of the pointer position and the triggering of the corresponding switching operation are realized by means of an IR diode and a phototransistor.
  • a Schmitt trigger 244 is used for detecting the change of the reflection behavior.
  • the ER diode 222 emits light and the reflected modulated infrared light is picked up by the phototransistor 232.
  • the phototransistor 232 together with the resistors 245 form a kind of voltage divider, with which the sensitivity, ie the required switching threshold, of the Schmitt trigger 244 can be adjusted.
  • a control unit 248 is actuated via the switching transistor 246.
  • the control unit 248 may be formed, for example, as a solenoid valve.
  • 5 shows a monitoring device according to a further exemplary embodiment of the present invention.
  • the monitoring device 200 has a first detection means 202 and a second detection means 204.
  • the first and second detection means 202, 204 are each attached to a ring 255.
  • the ring 255 can be attached to the housing of the display unit of the measuring device, for example by means of screws or else by means of a snap closure.
  • the first and second detecting means 202, 204 are freely movably connected to the ring 255. In this way, the circumferential distance D between the first and second detecting means 202, 204 can be variably set.
  • a measuring range can be defined in a simple manner in which, for example, the first detection means 202 define a minimum value and the second detection means 204 set a maximum value for the measured variable to be determined.
  • Fig. 6 shows a monitor according to still another embodiment of the present invention.
  • a first detection means 202 and a second detection means 204 are arranged in the region of the pointer tip 122.
  • the circumferential distance between the first detection means 202 and the second detection means 204 is fixed here. In this way, the measuring range between the minimum value and the maximum value is precisely set and can not be changed.
  • FIG. 7 shows a perspective view of the exemplary embodiment according to FIG. 6.
  • a first detection means 202 and a second detection means 204 are integrated in a substantially T-shaped arm 264 of the fastening means 250.
  • the substantially T-shaped arm 264 has a curvature that matches the circumference of the dial 110.
  • the T-shaped arm 264 is connected via a connecting means 262 to the carrier 260 of the fastening means 250.
  • the fastening means 250 has the snap mechanism 270 with swivel arm 274 and joint 278 already described above.
  • FIG. 8 shows the monitoring device from FIG. 7 in operation.
  • the first and the second detection means 202, 204 each transmit and receive light 226, 228 in order to detect the pointer position of the measuring device.
  • Fig. 9 shows a monitor according to still another embodiment of the present invention.
  • the structure does not differ fundamentally from the exemplary embodiment shown in FIG. 6.
  • the carrier 260 of the fastening means 250 is made longer in the radial direction, so that the first detection means 202 and the second detection means 204 are arranged in the region of the pointer foot 124.
  • both the first and the second detection means 202, 204 can each detect a first lateral edge 125 and a second lateral edge 126 of the pointer soot 124.
  • the second detecting means 204 may output a first signal when the second lateral edge 126 is detected and outputs a second signal when the first lateral edge 125 is detected.
  • z. B. a first warning level when recognizing the second lateral edge 126 and a second warning level or a shutdown when recognizing the first lateral edge 125 can be realized. Accordingly, too low measured values can be detected with the aid of the first detection means 202. Again, a one or two stage detection is possible, wherein first the first lateral edge 125 and then the second lateral edge 126 are detected.
  • Fig. 10 shows still another embodiment of the present invention.
  • This embodiment represents a further development of the exemplary embodiment from FIG. 9.
  • further detection means 206 are provided in addition to the first and the second detection means 202, 204.
  • the detection means 202, 204, 206 may be arranged in a ring around the axis of rotation 128. In this way, the position of the pointer 120 relative to the measurement scale 115 can be detected in segments. The segments may have the same or different angular expansions.
  • FIG. 11 shows a block diagram for a pressure monitor 300.
  • a high-pressure compressor 320 which is supplied with compressed air by a second compressor 310, is required for the operation of a test stand in the laboratory.
  • the pressure provided by the high-pressure compressor 320 may, for. B. do not exceed 1000 bar.
  • an analog manometer 100 is connected to a pressure line.
  • the analogue manometer indicates the pressure applied to the pressure line by means of a pointer.
  • the pressure gauge 100 is monitored by a monitor 200 according to an embodiment of the present invention. In this case, a control output of the monitoring device 200 is connected via a signal line 249 to a control device 330.
  • Monitor 200 Represents that Monitor 200 is exceeded exceeding the maximum allowable pressure value, so there is a control signal to the control unit 330 via the signal line 249 on.
  • the controller 330 controls a solenoid valve 335.
  • monitoring device 200 designed as an adapter the exceeding of the set maximum pressure via the optical sensor is automatically determined and the compressed air supply is automatically interrupted. Such an automatic shutdown has hitherto only been possible by replacing the analogue manometer with digital pressure gauges or the complex installation of forked light barriers and thus at high costs.
  • FIG. 11 shows how the monitoring device 200 registers the position of the pointer 120 by means of a first detection means 202 and a second detection means 204.
  • Both the first detection means 202 and the second detection means 204 are supplied via a common voltage supply 242.
  • the measurement signals from the first and second detection means 202, 204 are transmitted via respective preamplifiers 243 to respective Schmitt triggers 244 for detection of the reflection state.
  • the first and second detection means 202, 204 are connected to a comparator 247. If the comparator 247 determines that the set maximum value has been exceeded, a control signal is transmitted via the signal line 249 to the control unit 330. Due to this pressure signal, the controller 330 controls a solenoid valve 335 so as to reduce the compressed air supply to the high pressure compressor 320
  • the monitoring device is universally applicable and allows the electronic processing of analog measured values.
  • the adapter is portable and easy to set up on all common measuring devices, especially pressure gauges.
  • the sensor including the electronics is attachable to the housing of the meter and thus compatible with most meters. The monitor can be easily recovered be removed and used on already installed measuring instruments, without any intervention in the process flow would be necessary by the conversion.
  • the monitoring device can be used for measuring devices, in particular pressure gauges, different pressure levels, as a universal control device with adjustable pressure range and easy installation and put on.
  • the monitoring device permits opto-electrical monitoring and adjustment of desired measured value ranges, in particular pressure ranges, with virtually unlimited setting ranges and service life.
  • the monitoring device has an explosion-proof control, which can be powered externally thanks to microprocessor technology with minimal voltage.
  • the setting of the measuring ranges is very simple by manual adjustment, but can also be done remotely.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

L'invention concerne un dispositif de contrôle destiné à un appareil de mesure (100), présentant une aiguille (120) et une feuille (110), l'aiguille (120) et la feuille (110) présentant un comportement différent de réflexion à la lumière: Le dispositif comprend au moins un premier moyen de détection (210) doté d'une source lumineuse (220), et un détecteur (230), au moins un moyen de fixation (250) pour la fixation du moyen de détection (210) à l'appareil de mesure (100), et est caractérisé en ce que le moyen de détection (210) peut être disposé, par l'intermédiaire du moyen de fixation (250), de telle façon que le premier détecteur (230) puisse capter la lumière réfléchie (228), en provenance de l'appareil de mesure (100), lumière qui est émise par la première source lumineuse (220).
PCT/EP2007/005496 2006-06-21 2007-06-21 Dispositif de contrôle d'un appareil de mesure WO2007147609A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/305,930 US20110179990A1 (en) 2006-06-21 2007-06-21 Monitoring unit for a measuring instrument
DE202007018337U DE202007018337U1 (de) 2006-06-21 2007-06-21 Überwachungsgerät für ein Meßgerät
EP07785834A EP2035784A2 (fr) 2006-06-21 2007-06-21 Dispositif de contrôle d'un appareil de mesure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006028523.9 2006-06-21
DE102006028523 2006-06-21

Publications (2)

Publication Number Publication Date
WO2007147609A2 true WO2007147609A2 (fr) 2007-12-27
WO2007147609A3 WO2007147609A3 (fr) 2008-04-10

Family

ID=38833792

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/005496 WO2007147609A2 (fr) 2006-06-21 2007-06-21 Dispositif de contrôle d'un appareil de mesure

Country Status (3)

Country Link
US (1) US20110179990A1 (fr)
EP (1) EP2035784A2 (fr)
WO (1) WO2007147609A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008034161A1 (de) * 2008-07-22 2010-02-18 Siemens Aktiengesellschaft Verfahren zur Überwachung einer Anzeigeeinheit, insbesondere einer Anzeigeeinheit in einem Fahrzeug
WO2020234302A1 (fr) 2019-05-20 2020-11-26 Siemens Aktiengesellschaft Dispositif de lecture optique pour un instrument à pointeur
WO2023036423A1 (fr) 2021-09-09 2023-03-16 Siemens Aktiengesellschaft Dispositif de lecture capacitif pour instrument à aiguille

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JP6348326B2 (ja) * 2014-04-16 2018-06-27 株式会社ミツトヨ 測定器用表示装置、測定器、測定値のアナログ表示方法、及びプログラム
US11530936B2 (en) * 2019-08-01 2022-12-20 Denso International America, Inc. Plug-and-play stepper motor for a pointer display assembly

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US3441740A (en) * 1966-09-12 1969-04-29 Beede Elec Instr Co Inc Indicating meter relay with photoelectric means for sensing the overlapping of indicating pointer over set pointer
US4275393A (en) * 1979-07-03 1981-06-23 Polyvend Inc. Method and apparatus for sensing pressure
US5231508A (en) * 1989-03-21 1993-07-27 Murphy Jr Frank W Hall effect gauge with magnetically-sensitive variable-resistance element
US6201478B1 (en) * 1999-05-28 2001-03-13 American Underwater Products Inc. Scuba air device computer
US20060038695A1 (en) * 2004-08-18 2006-02-23 Isaacs Michael S Gas supply pressure alarm device

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US2017858A (en) * 1932-10-08 1935-10-22 William S Halstead Duplex frequency control and monitoring system
US6157311A (en) * 1999-01-07 2000-12-05 Berkovich; Yossi Portable electro-magnetic radiation sensor warning device
US6817743B2 (en) * 2002-01-28 2004-11-16 Allen Sharper Vehicle wheel illumination system

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Publication number Priority date Publication date Assignee Title
US3441740A (en) * 1966-09-12 1969-04-29 Beede Elec Instr Co Inc Indicating meter relay with photoelectric means for sensing the overlapping of indicating pointer over set pointer
US4275393A (en) * 1979-07-03 1981-06-23 Polyvend Inc. Method and apparatus for sensing pressure
US5231508A (en) * 1989-03-21 1993-07-27 Murphy Jr Frank W Hall effect gauge with magnetically-sensitive variable-resistance element
US6201478B1 (en) * 1999-05-28 2001-03-13 American Underwater Products Inc. Scuba air device computer
US20060038695A1 (en) * 2004-08-18 2006-02-23 Isaacs Michael S Gas supply pressure alarm device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008034161A1 (de) * 2008-07-22 2010-02-18 Siemens Aktiengesellschaft Verfahren zur Überwachung einer Anzeigeeinheit, insbesondere einer Anzeigeeinheit in einem Fahrzeug
EP2147845A3 (fr) * 2008-07-22 2016-05-11 Siemens Aktiengesellschaft Procédé de surveillance d'une unité d'affichage, notamment d'une unité d'affichage dans un véhicule
WO2020234302A1 (fr) 2019-05-20 2020-11-26 Siemens Aktiengesellschaft Dispositif de lecture optique pour un instrument à pointeur
DE102019207322A1 (de) * 2019-05-20 2020-11-26 Siemens Aktiengesellschaft Optische Ablesevorrichtung für ein Zeigerinstrument
DE102019207322B4 (de) 2019-05-20 2021-07-29 Siemens Aktiengesellschaft Optische Ablesevorrichtung für ein Zeigerinstrument
CN113853509A (zh) * 2019-05-20 2021-12-28 西门子股份公司 用于指针仪表的光学读取装置
WO2023036423A1 (fr) 2021-09-09 2023-03-16 Siemens Aktiengesellschaft Dispositif de lecture capacitif pour instrument à aiguille

Also Published As

Publication number Publication date
US20110179990A1 (en) 2011-07-28
WO2007147609A3 (fr) 2008-04-10
EP2035784A2 (fr) 2009-03-18

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